monoammoniumphosphat

Monoammoniumphosphat, often abbreviated as MAP, is an inorganic salt with the chemical formula NH4H2PO4. It is a commonly used fertilizer that provides both nitrogen and phosphorus, two essential macronutrients for plant growth. MAP is produced by reacting ammonia with phosphoric acid. It is a white crystalline solid that is soluble in water, making it easily absorbed by plants.

In agriculture, monoammoniumphosphat is valued for its ability to deliver a readily available source of phosphorus to crops, which is crucial for root development, flowering, and fruiting. The nitrogen it supplies also supports vegetative growth. MAP is considered a safe and effective fertilizer when applied according to recommended guidelines. Its relatively low pH can be beneficial in alkaline soils by helping to acidify the root zone.

Beyond its agricultural applications, monoammoniumphosphat is also utilized as a component in dry chemical fire extinguishers. When heated, it decomposes to release ammonia and phosphoric acid, which interfere with the combustion process by smothering the flame and forming a glassy barrier that prevents re-ignition. This dual functionality makes MAP a versatile compound in various industrial and domestic settings.